Janet Jackson tells OnTheRedCarpet.com what she hopes readers will gain from reading her new book, 'True You: A Journey to Finding and Loving Yourself' at the signing in West Hollywood on Friday, April 15, 2011. (OnTheRedCarpet.com)

"I don't know how much weight I've lost, only because I stay away from the scale," Jackson told the outlet. "I don't think [stepping on the scale] is healthy. You're setting yourself up to fail and women's bodies fluctuate every month - certain time of the month in particular - we bloat a great deal."

"I'm really happy with the way that I feel at the moment," she added. "I feel very good, and it's been a long time since I've felt this good."

The five-time Grammy winner wrapped up a world tour in December 2011, the month NutriSystem announced that she had become its new spokesmodel. Jackson performed at more than 35 cities - making it the singer's largest tour ever. The star told Peopel that when she is in a tour mode, her routine changes.

"If I'm getting ready for something like a tour, I work out six days a week," Jackson said. "I like to switch it up. I may go for a run or bike."

"We do a lot of functional training in this episode here and it's more like, for instance for a tour, for cardiovascular we do a lot of interval training, high speed interval training or we will walk for 3.0 minutes and run for six," he told OnTheRedCarpet.com. "But she always wants to go faster, longer and I have to hold the range back because she always wants to do more because I'm like, remember work out smarter, not harder."